Azure DevOps Test Plans Test retention - What influences setting back test outcome to Active?

Hey there, 

I just wanted to understand, what has an effect on the retention of the outcome of a test run. http:// https://learn.microsoft.com/en-us/azure/devops/test/how-long-to-keep-test-results?view=azure-devops#set-retention-period-for-test-results is explaining a setting for that. So, if I set the test retention setting „Days to keep..." to "Never delete" I'm expecting that the test outcome isn't touched after a specific time, right?

Are there any other use cases which leads into setting the test outcome back to active automatically, like changing a requirement which is linked (tested by) to the test case?

thx